Hi Arash, Thanks for your comments. I'll install the proposed fix as well as macrocode*? support, unless Mosè or Tassilo objects explicitly. Since `LaTeX-find-matching-begin' and `LaTeX-current-environment' is very similar in their task in implementation, I probably factor out the common code and simplify.
Regards, Ikumi Keita #StandWithUkraine #StopWarInUkraine
